CyArk, a non-for-profit 3D laser scanning organization, is scanning the world's greatest monuments, hoping to preserve over 500 cultural heritage sites around the globe, The Independent reports. The portable laser system creates such a detailed, digital blueprint of structures and ruins that each building can then be reproduced in 3D, with a margin of error of only two millimeters. So far, the statues of Easter Island, the Tower of London, Mount Rushmore, the Tower of Pisa have been preserved. Check out more about the technology in Ben Kacyra's TED Talk.